CVE-2020-28481
Insecure Defaults
CVE-2020-28481 is a medium vulnerability (CVSS 5.3) in Socket Socket.io, published January 19, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.74%, the 55th percentile. Fixed in socket.io 2.4.0.
- Severity
- 5.3 MediumCVSS 3.1, CVE List
- Exploit chance
- 0.74%EPSS, 55th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
2.4.0socket.io +5 more
Description
The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
socket.ionpm | before 2.4.0 | 2.4.0 |
js-jqueryAzure Linux:3 | through 3.5.0-4 | None known |
socket.ioTuxCare:npm | 2.1.1-tuxcare.0 up to 2.1.1-tuxcare.1, plus listed versions 2.1.1 | 2.1.1-tuxcare.1 |
socket.ioTuxCare:npm From an advisory covering 2 CVEs | 2.0.4-tuxcare.0 up to 2.0.4-tuxcare.1, plus listed versions 2.0.4 | 2.0.4-tuxcare.1 |
socket.ioTuxCare:npm From an advisory covering 2 CVEs | 1.7.4-tuxcare.0 up to 1.7.4-tuxcare.1, plus listed versions 1.7.4 | 1.7.4-tuxcare.1 |
socket.ioTuxCare:npm From an advisory covering 2 CVEs | 1.7.3-tuxcare.0 up to 1.7.3-tuxcare.1, plus listed versions 1.7.3 | 1.7.3-tuxcare.1 |
What each source reports
CVE List Score used
Insecure Defaults
The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.
- Record
CVE-2020-28481- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-0502
The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.
- Record
EUVD-2021-0502- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fxwf-4rqh-v8g3
CORS misconfiguration in socket.io
The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.
- Record
GHSA-fxwf-4rqh-v8g3- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-346, CWE-453
- Updated
- 2026-11-02
NVD
The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.
- Record
CVE-2020-28481- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:P/I:N/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
OSVAZL-44430
CVE-2020-28481 affecting package js-jquery 3.5.0-4
The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.
- Record
AZL-44430- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-05
OSV
The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.
- Record
CVE-2020-28481- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
Show 5 moreShow less
OSVGHSA-fxwf-4rqh-v8g3
CORS misconfiguration in socket.io
The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.
- Record
GHSA-fxwf-4rqh-v8g3- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-346, CWE-453
- Updated
- 2026-11-02
OSVCLSA-2026-1771978231No score
TuxCare security update for socket.io (1 CVE)
TuxCare rebuilt socket.io to address 1 CVE. Fixed in 2.1.1-tuxcare.1.
- Record
CLSA-2026-1771978231- Updated
- 2026-11-02
OSVCLSA-2026-1776818218No score
TuxCare security update for socket.io (2 CVEs)
TuxCare rebuilt socket.io to address 2 CVEs. Fixed in 2.0.4-tuxcare.1.
- Record
CLSA-2026-1776818218- Updated
- 2026-11-02
OSVCLSA-2026-1792604680No score
TuxCare security update for socket.io (2 CVEs)
TuxCare rebuilt socket.io to address 2 CVEs. Fixed in 1.7.4-tuxcare.1.
- Record
CLSA-2026-1792604680- Updated
- 2026-11-02
OSVCLSA-2026-1793304087No score
TuxCare security update for socket.io (2 CVEs)
TuxCare rebuilt socket.io to address 2 CVEs. Fixed in 1.7.3-tuxcare.1.
- Record
CLSA-2026-1793304087- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| facts | OSV | |
| aliases, products, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
snyk.io/vuln/SNYK-JS-SOCKETIO-1024859
github.com/socketio/socket.io/issues/3671
nvd.nist.gov/vuln/detail/CVE-2020-28481